Dental floss holder



FIG. 1 is a front elevational view of a dental floss holder showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a rear elevational view thereof; and

FIG. 4 is a left side elevational view thereof.

FIG. 5 is a right side perspective view thereof; and

FIG. 6 is a left side perspective view thereof. 

The ornamental design for a dental floss holder, as shown. 